SEGMENT INFORMATION, GEOGRAPHIC INFORMATION AND CUSTOMER CONCENTRATION - Reconciliation of Segment Operating Income to Consolidated Income Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total segment operating income	$ 45,519	$ 18,809	$ (12,449)
Unallocated corporate expenses	(270,365)	(240,933)	(207,446)
Stock-based compensation	(25,212)	(24,056)	(18,040)
Loss on convertible debt extinguishment	0	0	(1,362)
Non-operating expense, net	(1,034)	(9,938)	(12,406)
Income (loss) before income taxes	44,485	8,871	(26,217)
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total segment operating income	74,605	44,059	12,977
Corporate, Non-Segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Unallocated corporate expenses	(3,874)	(681)	(3,416)
Stock-based compensation	(25,212)	(24,062)	(18,040)
Amortization of intangibles	$ 0	$ (507)	$ (3,970)